20886411641 has 4 divisors (see below), whose sum is σ = 20886756852. Its totient is φ = 20886066432.

The previous prime is 20886411631. The next prime is 20886411649. The reversal of 20886411641 is 14611468802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3772539241 + 17113872400 = 61421^2 + 130820^2 .

It is a cyclic number.

It is not a de Polignac number, because 20886411641 - 2⁶ = 20886411577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886411649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55256 + ... + 211721.

It is an arithmetic number, because the mean of its divisors is an integer number (5221689213).

Almost surely, 2^20886411641 is an apocalyptic number.

It is an amenable number.

20886411641 is a deficient number, since it is larger than the sum of its proper divisors (345211).

20886411641 is an equidigital number, since it uses as much as digits as its factorization.

20886411641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345210.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 20886411641 in words is "twenty billion, eight hundred eighty-six million, four hundred eleven thousand, six hundred forty-one".